Klock Werks design team has taken the guess work out of tire-hugging fender styles These fenders are thick enough to add rigidity to the front end by acting like a fork brace but can still be cut or shaped enough for an even more Kustom appearance Fenders are stamped steel, not spun, and E-coated for the ultimate smooth, long lasting fender All fenders come predrilled Installation requires use of Klock Werks Tire Hugger Front Fender Mounting Blocks, 350-878 Raw are sold separately For 21" front wheels, this style measures 4-1/2" outside width and will fit stock as well as tires up to 100mm wide